1.14 A sample of methane of mass 4.50 g occupies 12.7 dm3 at 310 K. Calculate the work done when the gas expands (a) isobarically against
a constant external pressure of 30.0 kPa until its volume has increased
by 3.3 dm3, and (b) isothermally by 3.3 dm3.

Why does the input force have to be greater than the force needed to lift the bale?

Suppose that recording station n is located 200 km north of the epicenter of an earthquake, and recording station s is located 100 km south of the epicenter of the same earthquake. which of the following statements would be true?

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.